Cover for the openings of cooking stove hot plates



Aug. 15, 1933. o. HERZMANN COVER FOR THE OPENINGS OF COOKING STOVE HOTPLATES Original Filed July 6, 1930 Jr? W for:

Patented Aug. 15, 1933 PATENT OFFICE COVER FOR THE OPENINGS OF COOKINGSTOVE HOT PLATES Otto Hermann, Essen, Germany Application July 16, 1930,Serial No. 470,009, and in Germany July 23, I929. Renewed January 1 4Claims.

The invention relates to covers for the openings of cooking stovehot-plates and has for its object to increase the eiliciency of coversfor this class. 7

An embodiment of the subject-matter of .the invention is illustrated byway of example in the accompanying drawing in which.

Figure 1 ls a cross section through the cover,

Figure 2 is a top view of the cover.

Figure 3 is a sectional view of a suction nozzle on an enlarged scale,

Figure 4 is a sectional view of-a damper of the cover likewise on anenlarged scale.

A hot plate a has inserted in it a cover b which possesses on itsunderside a flue open toward the source of heat and-extending in aspiral line. This flue is formed by a vertical spiral rib 0 pro jectingfrom the cover b. On the outer end of the flue thus formed is providedan adjustable damper h, see also Figure 4. The rib 0 includes aplurality of nozzles d, see also Figure 3, having each slower aperture 0and an upper outlet port 1 extending about tangentially to the spiralline of the flue.

The described cover b is inserted in the hot plate a in such a mannerthat the outer end of the flue is turned toward the smoke pipe of thefurnace, with the damper h in open position. A portion of the smokegases then streams through the flue on the underside of cover b whereby,as tests have shown, an increased transmission to heat the plate I) isobtained. As the inventor has observed, a sucking action takes place inthe suction nozzles d whereby the flow of the heating gases in the flueis increased. This flow can be regulated by suitably adJusting thedamper h or by turning the whole cover I: relatively to plate a.

What is claimed is,-

1. In a furnace of the class described a stove hot-plate, aheating-opening therein, a cover fltting into the said heating-opening,and hollowspaces formed on its interior surface adapted for receivingthe heating gases, said hollow-spaces forming a flue extending in aspiral line and being open at its outer end.

2. In a furnace of the class described a stove hot-plate, aheating-openingtherein, a cover fltting into the said heating-opening,hollow-spaces formed on its interior surface adapted for receiving theheating gases, and means arranged on the cover for sucking the heatinggases into the hollow-spaces.

3. In a furnace of the class described a stove hot-plate, aheating-opening therein, a cover fltting into the said heating-opening,hollow-spaces formed on its interior surface adapted for receiving theheating gases, and suction nozzles arranged on the cover for sucking theheating gases into the hollow-spaces, each consisting of an inletopening turned towards the arriving heating gases and an outlet openingarranged about tangentially to the spiral line of the flue.

4. In a furnace of the class described a stove hot-plate, aheating-opening therein, a cover fitting into the said heating-opening,hollow-spaces formed on its interior surface adapted for receiving theheating gases, said hollow-spaces forming a flue extending in a spiralline and an adjustable damper arranged at the outlet opening of theflue.

O'I'IO HERZMANN.

